Gross-Wen Technologies

Gross-Wen Technologies (GWT) is a wastewater treatment technology company built around its Revolving Algal Biofilm (RAB) system, an algae-based process for recovering nutrients from wastewater. The company positions the system as an alternative to conventional wastewater treatment technologies for municipal, industrial and agricultural users.

The RAB system is described as recovering and reusing nitrogen and phosphorus from wastewater while producing an algae byproduct. GWT states that the process operates with very low energy input, requires no chemical inputs, and reduces the carbon footprint and life-cycle costs of treatment relative to other approaches. Applications span municipal primary, secondary and tertiary treatment, anaerobic digestate treatment, and industrial and agricultural effluent treatment.

Business model

GWT deploys its RAB system at customer sites, progressing from pilot and demonstration installations to full-scale systems at municipal utilities and industrial facilities. [0]

Traction

The company lists a portfolio of deployments across demonstration, pilot and full-scale stages, including full-scale sites at Pasco, Washington (industrial food and beverage), Iowa City, Iowa (municipal anaerobic digestate treatment) and Slater, Iowa (municipal primary treatment); demonstration sites in Chicago, Creston and Slater; and pilots with Darling in Sioux City, Iowa and Wahoo, Nebraska, Grain Processing Corp., Herrema Dairy, Muscatine, Iowa, Stickney in Chicago, a large corn processor, and Singapore. [0]